I know how on windows 7, open the trainer,then the game like normal,hit f1 at main menu like normal, then shrink the game, right click the speaker button in the bottom right of the desktop, open sound mixer and mute the trainer, Enjoy
[Edited by oneshot40, 9/30/2011 6:37:53 PM]
Yea I originally posted this back in 2009.
Since then windows 7 has made all these problems easier. I can just mute the trainer by itself and leave the game alone.
I also found that if you hold down a hotkey while simultaneously turning off numpad it keeps the last number depressed constantly.. that way I dont need to wedge coins into my keyboard to space trainer hotkeys.
[Edited by woots, 10/2/2011 1:13:54 PM]